COMPARATIVE ANALYSIS OF WLTP AND CLTC TEST CYCLES FOR PASSENGER ELECTRIC VEHICLES: FEATURES OF CONDUCTING MEASUREMENTS AND UNIFICATION OF INDICATORS

Abstract

The fleet of electric vehicles in the world is growing significantly, and in 2020 sales exceeded 6 million units. At the same time manufacturers are addressing the issue of increasing battery capacity and reducing battery prices. One of the pressing problems in the operation of an electric vehicle is the driving range on a single full charge of the on-board battery. Manufacturers of different countries use different test cycles. For European companies such a cycle is WLTP, and for Chinese manufacturers it is CLTC. A comparative assessment of the European and Chinese evaluation cycles in use is given. Under different conditions, not entirely correct information about the main technical characteristic of an electric vehicle is conveyed to the potential buyer. That is precisely why the article proposes a method for comparing the driving autonomy of two different electric vehicles produced by a European company and by a Chinese manufacturer. With similar initial technical characteristics, different indicators were obtained at the output. The scientific article presents the features of taking measurements within the framework of the WLTP and CLTC test cycles for passenger electric vehicles. The stages of the tests, their duration and some physical indicators are given. An analysis of various methods and approaches made it possible to establish that the previously used NEDC cycle was applied to an equal extent throughout the world. It has now been abandoned, but to a certain extent it is connected with modern cycles. On this basis the technical parameters of the Mercedes-Benz EQA and Omoda E5 models were converted to a common indicator. In the course of the work 12 relevant literature sources were analysed.